In order to troubleshoot your problem with apt-get, apt or aptitude we need ALL OF THE FOLLOWING information: 1. complete output of your apt-get/apt/aptitude run (including the command used) 2. output from "apt-cache policy pkg1 pkg2..." for ALL packages mentioned ANYWHERE in the problem, and 3. "apt-cache policy". Use http://paste.debian.net/ to provide us with this information. Also ask me about <localized errors>.